Air-brake-setting device.



J. H. WATTERS.

AIR BRAKE SETTING DEVICE.

APPLICATION IILBD JUNE 4, 191a.

Patented May 12, 1914.

Jazzjzi/zizfw Attorneys JOHN H. WATTERS, OF AUGUSTA, GEORGIA.

AIRBRAKE-SETTING DEVICE.

To all whom it may concern:

Be it known that I, J OHN H. \VA'r'rnRs, a citizen of the United States, residing at Augusta, in the county of Richmond and State of Georgia, have invented a new and useful i-iir-Brake-Settmg Device, of which the following is a specification.

My invention relates to new and useful improvements in an air brake setting de vice.

The object of the invention is the provision of means whereby the brakes are set automatically when a predetermined speed has been reached.

lVith the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The drawings illustrate a top plan view partly broken away and partly in section to clearly show the invention.

My device is adapted to be secured to a locomotive or car and in the drawings the numeral 1 indicates an axle and 2 a pulley secured to the axle by means of the clamping plate A cylinder 41- is provided and in. the cylinder is secured a plate 5. A piston rod (3 passes through one end of the cylinder and through the plate 5 and on this piston rod are secured the piston heads 7. A nut 8 is secured on the threaded end of the piston rod 6 and engages the plate 5 as shown in the drawing when my device is in its normal position. A coiled spring 10 surrounds the piston rod between the plate 5 and one piston head 7. The tension of the spring can be adjusted by the nut 8. The train pipe 11 enters the cylinder at a point between the two piston heads, and openings 12 are formed around the cylinder at a point on the opposite side of one piston head from which the train pipe enters. A sleeve 13 surrounds one end of the piston rod 6 and is secured in place by means of the clamping plate 14. A pulley 15 is secured on the sleeve 13 and a belt 16 passes around and connects the pulleys 2 and 15. A centrifugal governor 17 is secured at one Specification of Letters Patent.

Application filed June 4, 1913.

Patented May 12, 1.91 1. Serial No. 771,715.

end to the sleeve 13 and at the opposite end to the rod (3 as shown at 18.

Having fully described the detail construction of my device I will now describe the operation. Vhen the device is in the position shown in the drawing the brakes are in a released position but when too great a speed is secured the governor will push against the end of the piston rod, overcoming the spring 10 and forcing the piston head to the position shown in dotted lines.

This will allow the air from the train pipe 11 to escape through the openings 12 and the brakes will thereby be set. When the speed of the train is reduced the piston heads will return to their normal position but the brakes will not be released until operated by the engineer. It will be seen that by providing the two piston heads and the train pipe entering the cylinder at a point between the two heads I have provided a balanced piston which will-be held in its normal position until the spring is overcome by the action of the centrifugal governor.

Having fully described the invention what I claim as new and desire to secure by Lettors Patent is:

1. An air brake setting device comprising a cylinder, a piston rod passing through one end of the cylinder, two piston heads secured on the rod, an air inlet pipe entering the cylinder between the heads, a spring ongaging one end of the cylinder and one pis ton head, and a governor connected to the piston rod.

2. An air brake setting device comprising a cylinder, a plate secured in said cylinder, a piston rod passing through one end of the cylinder and the plate, two piston heads se cured on the rod, a coiled spring surrounding the piston rod between the plate and one piston head, an air inlet pipe leading into the cylinder between the heads, outlet openings in the cylinder on the opposite side of one piston head, and a governor connected to the piston rod.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

JOHN H. U\ TEES.

Witnesses MARIE Lown, WV. W. FRY, Jr,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

